Novel lithium-sulfur battery and preparation method thereof
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A sulfur battery and a new technology are applied in the field of new lithium-sulfur batteries and their preparation, which can solve the problems of loss of active material and insufficient cycle performance, and achieve the effects of low equipment requirements, omitting the preparation process, and simple and easy process.
Active Publication Date: 2013-06-05
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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Problems solved by technology
However, the above-mentioned technologies are all centered on the synthesis of sulfur-containing composite cathodes, through complex synthesis methods, expensive raw materials and
Method used
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preparation example Construction
[0043] As one of the preferred specific application schemes, the preparation method of the aforementioned novel lithium-sulfur battery may include the following steps:
[0044] 1. Preparation method of positive electrode:
[0045] (1) Preparation of porous electrodes by coating method
[0046] a. Select porous conductive materials, such as micro- and mesoporous activated carbon, nickel foam particles, etc.;
[0047] b. Dissolve the porous material and the binder uniformly in the solvent in an appropriate proportion;
[0048] c, coating the positive electrode slurry of b on the positive electrode current collector;
[0049] d. Dry the solvent in vacuum and store it for future use.
[0050] (2) Preparation of porous electrodes by electrodeposition
[0051]a. Surface treatment and cleaning of the substrate of the porous positive electrode;
[0052] b. Prepare the electrodeposition solution of the porous electrode material;
[0053] c. Deposit alloys (such as Pt, Ni, Cu and ...
Embodiment 1
[0068] Embodiment 1: Positive pole adopts conductive nickel mesh, negative pole adopts metal lithium sheet, and 2mol / L sublimated sulfur is dissolved in 30mL electrolytic solution (solvent by volume ratio DOL:DME:CS 2 =2:2:1, the lithium salt concentration is 1.0mol / L LiTFSI and 0.2mol / L LiNO 3 ), self-made battery test performance equipped with two electrodes, the test current is 0.5mA, and the charge and discharge range is 1.5-3.0V.
Embodiment 2
[0069] Embodiment 2: The positive electrode adopts conductive nickel foam, and other steps are as in Embodiment 1.
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Abstract
The invention discloses a novel lithium-sulfur battery and a preparation method thereof. The novel lithium-sulfur battery comprises an anode, an electrolytic solution and a lithium-containing cathode, wherein the electrolytic solution comprises a solvent and an electrolyte, the anode preferably adopts a sulfur-free porous electrode, the electrolytic solution also contains sulfur and/or sulfide, and the electrolyte comprises a lithium salt. The preparation method comprises the steps of: respectively preparing the anode, the electrolytic solution and the lithium-containing cathode and assembling the anode, the electrolytic solution and the lithium-containing cathode into a novel lithium-sulfur battery. According to the simple novel lithium-sulfur battery provided by the invention, the complex preparation process of the sulfur anode is avoided, the process cost is reduced, and the problems of difficulty in exerting the capacity due to non-uniform distribution of an active substance sulfur in the conventional sulfur anode material, low sulfur utilization rate, instable performance of the battery, and the like can also be avoided.
Description
technical field [0001] The invention relates to a lithium battery, in particular to a novel lithium-sulfur battery and a preparation method thereof. technical background [0002] Lithium-sulfur batteries have attracted the attention of researchers due to their incomparably high specific capacity and energy density, low price of materials, and large storage capacity. Especially in recent years, the research on lithium-sulfur batteries at home and abroad has been quite active. , the technological breakthrough has reached the stage of practical application. In traditional Li / S batteries, the active material sulfur or sulfide is fixed on the positive electrode, assuming that the sulfur in the positive electrode reacts completely to form Li 2 S, the theoretical specific capacity that can be released is 1672 mAh / g, and the theoretical specific energy is 2600 Wh / Kg, which is an order of magnitude higher than the current commercial metal oxide and other positive electrode materials...
Claims
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IPC IPC(8): H01M10/0525H01M10/0563H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 吴晓东胡园园许晶晶
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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